What has been selling in bookstores the first quarter of 2008? Thanks to Oprah Winfrey's book club, Eckhart Tolle's self-help A New Earth has dominated USA TODAY's Best-Selling Books list. This week it is No. 1 for the ninth consecutive week, creeping up on the consecutive-week mark set by another self-help title, The Secret by Rhonda Byrne: 13 straight weeks at No. 1 in 2007.